Hey guys, got this off of Were-Here, you can program flash MX actions in flash 5. All you need to do is use flash 5 to make your MX actions, then open the swf in a hex editor, and change:

4657 5305 FWS.
into
4657 5306 FWS.

Then open it with the flash 6 player, and it works!

Have fun with it.